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Filter outlet pressure difference of change, when the differential pressure to set data, control device for hydraulic control valves, motor drive signal, caused by the following action: motor driving brush rotation, the filter cleaning, emission control valve to open at the same time, the whole cleaning process for dozens of seconds, when the end of the cleaning, close the valve, the motor stop running, system back to its initial state, began to filter into the next process
1. Secrets to Closing the Sale by Zig Ziglar 2. Sales Closing for Dummies by Tom Hopkins 3. Secrets of Closing Sales by Roy Alexander and Charles B. Roth 4. The Psychology of Selling: The Art of Closing Sales by Bryan Tracy 5. The Art of Closing any Deal by James W. Pickens 6. Big League Sales Closing Techniques by Les Dane
Sunglasses allow better vision in bright daylight, and may protect one's eyes against damage from high levels of ultraviolet light. Typical sunglasses are darkened for protection against bright light or glare; some specialized glasses are clear in dark or indoor conditions, but turn into sunglasses when in bright light. Most sunglasses do not have corrective power in the lenses; however, special prescription sunglasses can be ordered. Specialized glasses may be used for viewing specific visual information (such as stereoscopy) or 3D glasses for viewing three-dimensional movies. Sometimes glasses with no corrective power in the lenses are worn simply for aesthetic or fashion purposes. Even with glasses used for vision correction, a wide range of designs are available for fashion purposes, using plastic, wire, and other materials.
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